GOT Star Nikolaj Coster-Waldau Set for Scripted Serial Killer Podcast Posted on Nikolaj Coster-Waldau of Game of Thrones fame will star in a new role as a serial killer in a new crime podcast titled Mask of Sanity. Written by Joe Derrick, the series will focus on "a serial killer story based on a true story from Bulgarian journalist, Dimiter Kenarov." This is part of a bigger deal between Amazon's Audible, Big Light Productions, and Vespucci for an entire slate of podcasts. Coster-Waldau will also produce the series through his Ill Kippers Productions label. it will start to air on Audible later on in 2021. Deadline reported the news.